linux-kernel - [PATCH] checkpatch: auto detect codespell dictionary path

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Date:   Mon, 10 May 2021 22:41:27 +0530
From:   Dwaipayan Ray <dwaipayanray1@...il.com>
To:     joe@...ches.com
Cc:     linux-kernel@...r.kernel.org, lukas.bulwahn@...il.com,
        Dwaipayan Ray <dwaipayanray1@...il.com>
Subject: [PATCH] checkpatch: auto detect codespell dictionary path

The codespell dictionary was moved from
`/usr/share/codespell/dictionary.txt` to data/dictionary.txt
under the codespell_lib installation directory.

Checkpatch still uses a default absolute path for it which will
no longer work on new codespell installations unless the path
is specified through --codespellfile.

Detect the codespell dictionary path dynamically during
runtime if the default path or the user provided dictionary
path does not exist.

Signed-off-by: Dwaipayan Ray <dwaipayanray1@...il.com>
---
 scripts/checkpatch.pl | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 23697a6b1eaa..cc69d2c758a3 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -889,6 +889,13 @@ if (open(my $spelling, '<', $spelling_file)) {
 }
 
 if ($codespell) {
+	if (! -e "$codespellfile" && which("python3") ne "") {
+		my $output = `python3 -c "import codespell_lib; print(codespell_lib.__file__, end='');" 2>/dev/null`;
+		my $dictionary_path = dirname($output) . "/data/dictionary.txt";
+		if (-e "$dictionary_path") {
+			$codespellfile = $dictionary_path;
+		}
+	}
 	if (open(my $spelling, '<', $codespellfile)) {
 		while (<$spelling>) {
 			my $line = $_;
-- 
2.28.0